From: Roger Pau Monne <roger.pau@citrix.com>
Date: Tue, 13 Apr 2021 12:51:44 +0000 (+0200)
Subject: tests/cpu-policy: add sorted MSR test
X-Git-Tag: archive/raspbian/4.16.0+51-g0941d6cb-1+rpi1~2^2~42^2~587
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=b8e53a81ba538849b98b0d417436f8be653fa1ff;p=xen.git

tests/cpu-policy: add sorted MSR test

Further changes will rely on MSR entries being sorted, so add a test
to assert it.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
---

diff --git a/tools/tests/cpu-policy/test-cpu-policy.c b/tools/tests/cpu-policy/test-cpu-policy.c
index cb578ca6e5..75973298df 100644
--- a/tools/tests/cpu-policy/test-cpu-policy.c
+++ b/tools/tests/cpu-policy/test-cpu-policy.c
@@ -89,6 +89,16 @@ static bool leaves_are_sorted(const xen_cpuid_leaf_t *leaves, unsigned int nr)
     return true;
 }
 
+static bool msrs_are_sorted(const xen_msr_entry_t *entries, unsigned int nr)
+{
+    for ( unsigned int i = 1; i < nr; ++i )
+        /* MSR index went backwards => not sorted. */
+        if ( entries[i - 1].idx > entries[i].idx )
+            return false;
+
+    return true;
+}
+
 static void test_cpuid_current(void)
 {
     struct cpuid_policy p;
@@ -273,6 +283,13 @@ static void test_msr_serialise_success(void)
             goto test_done;
         }
 
+        if ( !msrs_are_sorted(msrs, nr) )
+        {
+            fail("  Test %s, MSR entries not sorted\n",
+                 t->name);
+            goto test_done;
+        }
+
     test_done:
         free(msrs);
     }